Quantitative Aptitude Ques 864

Question: By selling 1 dozen ball pens, a, shopkeeper earned the profit equal to the selling price of 4 ball pens. His profit per cent is

Options:

A) $ 50 $ %

B) $ 40 $ %

C) $ 33\frac{1}{3} $ %

D) $ 33\frac{1}{4} $ %

Show Answer

Answer:

Correct Answer: A

Solution:

  • Profit = SP of 4 pen $ Profit=SP-CP $ SP of 4pen = SP of 12pen $ -CP $ of 12 pen

$ \therefore $ CP of 12 pen = SP of 8 pen Gain% = $ \frac{SP,-CP}{CP},\times $ 100% = $ ( \frac{SP}{CP},-,1 ),\times $ 100% $ =,( \frac{3}{2},-,1 ),\times $ 100% = $ \frac{1}{2},\times $ 100% =50%

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